Abstract
In response to the Federal Water Pollution Control Act (a.k.a., Clean Water Act) of 1972, forestry best management practices (BMPs) were developed and subsequently implemented to address NPS pollution during forest management. BMP guidelines vary by state and can be non-regulatory, quasi-regulatory, or regulatory. To determine how effective the guidelines for protecting water quality are, research literature relating to BMP effectiveness was evaluated. Forestry BMP effectiveness studies are often site or region specific. Therefore, BMP research in the United States was divided into three regions: northern, southern, and western. Thirty research studies were reviewed for the southern region with the majority being conducted in the Piedmont and Coastal Plain physiographic regions. The western region had thirty-one studies, most of which were in the Pacific Border physiographic region. The northern region had twenty studies primarily in the northeastern states. Forestry BMP effectiveness research generally focused on forest water quality from timber harvesting, site preparation, forest road construction and maintenance, stream crossings, and other categories of forest operations. The literature indicates that forestry BMPs protect water quality when constructed correctly and in adequate numbers. Forestry BMP effectiveness studies allow state forestry BMP programs to evaluate progress in reducing non-point source pollution and achieving water quality goals established under the Clean Water Act (CWA). Furthermore, states have used research findings to change BMPs and improve their guidelines. Although forestry BMPs have been proven to protect water quality, they are still being refined to enhance their performance.
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